<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>RuiLong-注册失败!</title>
</head>
<body>
<h1>用户已同名</h1>
<br>
<a href="/">
    <button>返回主页</button>
</a>
</body>
</html>